Appendix D Explanation of Homing Modes 
D-21 
 Mode 27 
Circumstance 1:   MC_Home instruction is executed while the home switch is OFF and the axis starts to 
move in the negative direction at the first-phase speed. The motion direction changes 
and the axis moves at the second-phase speed when the home switch is ON. Where 
the axis stands is the home position when the home switch is OFF. 
Circumstance 2:   MC_Home instruction is executed while the home switch is ON and the axis moves in 
the positive direction at the second-phase speed. Where the axis stands is the home 
position when the home switch is OFF. 
Circumstance 3:   MC_Home instruction is executed while the home switch is OFF. The axis moves in 
the negative direction at the first-phase speed. The motion direction changes and the 
axis moves at the first-phase speed when the home switch is OFF and the negative 
limit switch is ON. When the home switch is ON, the axis starts to move at the second-
phase speed. Where the axis stands is the home position when the home switch is 
OFF. 
 
 
Homing depending on the home switch and negative limit switch (
○
27: mode 27) 
 
   
27
27
27
Home 
switch
Negative 
limit switch
Circumstance 1
Circumstance 2
Circumstance 3
Positive direction
Positive direction
Positive direction
Start point
Start point
Start point